what I did:
1. roll out dough into a large circle, large enough to cover your pizza pan
2. mix ricotta, mozzarella and seasonings, set aside
3. sauté onion in olive oil, ~5-10 mins (until they are starting to become translucent)
4. spread the ricotta mixture over half of the circle, ~1” from the edge
5. top with chopped spinach (we put our spinach on raw, we SHOULD have sautéed it first, at least that is my opinion), place onions on top of the spinach and sauce on top of onions
6. fold the pizza over and seal the edges together
7. brush the calzone with a whisked egg and cut some venting slits into it
8. bake @400 for ~20-25mins